Light-based treatment device



FIG. 1 is an elevation view of the left side of the light-based treatment device;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a bottom perspective view thereof; and,

FIG. 5 is a side perspective view thereof.

The broken line(s) which define the bounds of the claimed invention form no part thereof. 

The ornamental design for a light-based treatment device, as shown and described. 